The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Acquisitions (Narrative) (Details) (USD $)	0 Months Ended		3 Months Ended
Acquisitions (Narrative) (Details) (USD $)	Jan. 14, 2011 Arresto Biosciences, Inc. [Member]	Dec. 31, 2010 Arresto Biosciences, Inc. [Member]	Mar. 31, 2011 Calistoga Pharmaceuticals, Inc. [Member]	Apr. 02, 2011 Calistoga Pharmaceuticals, Inc. [Member]	Feb. 28, 2011 Calistoga Pharmaceuticals, Inc. [Member]	Sep. 30, 2011 Oceanside Research And Clinical Manufacturing Facility [Member]
Business Acquisition [Line Items]
Fair value of consideration transferred for business acquisition		$ 225,000,000			$ 375,000,000
Potential payments based on the achievement of milestones					225,000,000
Acquisition-date fair value of total consideration transferred to acquire company	227,100,000		484,300,000
Total cash paid for acquisition	221,700,000		373,700,000			28,300,000
Contingent consideration paid	5,400,000		110,600,000
Acquisition-date fair value of intangible assets	117,000,000		149,200,000
Present value discount rate	16.00%		11.00%
Fair values assigned to the assets acquired and liabilities assumed	227,069,000			484,298,000
Goodwill resulting from acquisition	$ 134,482,000		$ 336,951,000	$ 336,951,000